Kiisu V4a/V4b companion firmware

To provide compatibility with Flipper Zero Firmwares on Kiisu development boards.

Status

• Display init & data transfer - working
• Power control - working
• LP5562 led driver emulation - partial
• BQ27220 emulation - working
• BQ25896 emulation - working

Building

Use CMAKE or VisualGDB project (Companion\KiisuCompanion.sln)

Flashing via Kiisu Companion Bridge

• This method will work only for Kiisus produced from 1 September 2025 or later.
• Use Kiisu Companion Bridge app (https://github.com/twoelw/kiisu-companion-bridge). Follow the link and see instructions.
• Kiisu Companion Bridge also included into Kiisu firmware (https://github.com/kiisu-io/kiisu4).

Flashing via SWD or USB interface

• This method will work always, buy you need to make or buy SWD programmer or USB adapter.
• Get manual for your board here: https://github.com/kiisu-io/kiisu4 and follow the instructions.

Other resources

• Kiisu.io website

• Buy Kiisu here

• Documentation, schematics and binaries for Kiisu V4

• Our Discord Community can help with your questions

• Fork of Flipper Zero official firmware for Kiisu

• Twoelw's GitHub with useful apps and firmware for Kiisu.

• Cases and stuff for 3D printing on Printables

• Cases and stuff for 3D printing on Makerworld